Subject: Liturgy
Title: Antiphonale
Subject: Liturgy
Title: Graduale
Subject: Liturgy
Title: Graduale
Subject: Medicine
Author of work: Galen
Title: Tegni Galieni'
Subject: Liturgy
Title: Missale
Subject: Canon Law
Author of work: Gregorius IX
Title: Decretales
Subject: Liturgy
Title: Missale
Subject: Canon Law
Author of work: Gescelinus
Title: Comment. in constitutiones Clementinas
Subject: Canon Law
Title: Comment. in constitutiones Clementinas
Subject: Philosophy
Author of work: Alexander Nequam
Title: De natura rerum